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Repetitive marsquakes in Martian upper mantle

Marsquakes excite seismic wavefield, allowing the Martian interior structures to be probed. However, the Martian seismic data recorded by InSight have a low signal-to-noise ratio, making the identification of marsquakes challenging. Here we use the Matched Filter technique and Benford’s Law to detec...

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Detalles Bibliográficos
Autores principales: Sun, Weijia, Tkalčić, Hrvoje
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8967838/
https://www.ncbi.nlm.nih.gov/pubmed/35354818
http://dx.doi.org/10.1038/s41467-022-29329-x
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author Sun, Weijia
Tkalčić, Hrvoje
author_facet Sun, Weijia
Tkalčić, Hrvoje
author_sort Sun, Weijia
collection PubMed
description Marsquakes excite seismic wavefield, allowing the Martian interior structures to be probed. However, the Martian seismic data recorded by InSight have a low signal-to-noise ratio, making the identification of marsquakes challenging. Here we use the Matched Filter technique and Benford’s Law to detect hitherto undetected events. Based on nine marsquake templates, we report 47 newly detected events, >90% of which are associated with the two high-quality events located beneath Cerberus Fossae. They occurred at all times of the Martian day, thus excluding the tidal modulation (e.g., Phobos) as their cause. We attribute the newly discovered, low-frequency, repetitive events to magma movement associated with volcanic activity in the upper mantle beneath Cerberus Fossae. The continuous seismicity suggests that Cerberus Fossae is seismically highly active and that the Martian mantle is mobile.
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spelling pubmed-89678382022-04-20 Repetitive marsquakes in Martian upper mantle Sun, Weijia Tkalčić, Hrvoje Nat Commun Article Marsquakes excite seismic wavefield, allowing the Martian interior structures to be probed. However, the Martian seismic data recorded by InSight have a low signal-to-noise ratio, making the identification of marsquakes challenging. Here we use the Matched Filter technique and Benford’s Law to detect hitherto undetected events. Based on nine marsquake templates, we report 47 newly detected events, >90% of which are associated with the two high-quality events located beneath Cerberus Fossae. They occurred at all times of the Martian day, thus excluding the tidal modulation (e.g., Phobos) as their cause. We attribute the newly discovered, low-frequency, repetitive events to magma movement associated with volcanic activity in the upper mantle beneath Cerberus Fossae. The continuous seismicity suggests that Cerberus Fossae is seismically highly active and that the Martian mantle is mobile. Nature Publishing Group UK 2022-03-30 /pmc/articles/PMC8967838/ /pubmed/35354818 http://dx.doi.org/10.1038/s41467-022-29329-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Sun, Weijia
Tkalčić, Hrvoje
Repetitive marsquakes in Martian upper mantle
title Repetitive marsquakes in Martian upper mantle
title_full Repetitive marsquakes in Martian upper mantle
title_fullStr Repetitive marsquakes in Martian upper mantle
title_full_unstemmed Repetitive marsquakes in Martian upper mantle
title_short Repetitive marsquakes in Martian upper mantle
title_sort repetitive marsquakes in martian upper mantle
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8967838/
https://www.ncbi.nlm.nih.gov/pubmed/35354818
http://dx.doi.org/10.1038/s41467-022-29329-x
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